Calculating Probability of an Event

Q.

Each of the numbers from $1$ to $30$ is written on a card and placed in a bag. If one card is drawn at random, what is the probability that the number is a multiple of $2$ or a multiple of $3$?

Q.

If a coin is tossed twice, is the probability of getting two heads equal to the probability of getting no heads at all? What are the two probabilities in the order of

i) Getting two heads

ii) Getting no heads

1. No; ;

2. No; ;

3. Yes ;

4. Yes ;

Q. Arrange in ascending order

1. $\frac{2}{5}$
2. $\frac{3}{4}$
3. $1\frac{1}{2}$
4. $\frac{1}{2}$
5. $\frac{4}{5}$

Q. The pie chart below shows the favorite snacks of 24 people.


Estimate the number of people whose favorite snack is chips if there are 720 people in a village.

1. 320
2. 360
3. 280
4. 270

Q. A box has $4$ red, $3$ green, and $7$ blue balls. Penny picks a ball blindfolded. What is the probability of picking a blue ball or a red ball?

Q. If we make a pie chart using the probability values of diffetent types of fruits sold, which fruit will occupy the maximum area in the pie chart?

1. Melons
2. Berries
3. Citrus fruits
4. Tropical fruits

Q. The table below shows a random sample data of the preference of genre among the people at the club.
Estimate the number of people who are not interested in listening to pop music at the club.

1. 456
2. 156
3. 444
4. 300

Q. A survey is conducted on a random sample at each club as shown to survey the most popular genre among the people.Determine the genre which is preferred the most by the people.

1. Pop
2. Cannot be determined
3. Hip hop
4. Rock

Q. A survey is being conducted on a random sample as shown to analyse the music preference of the people.

Pop music is preferred by % of people.

1. 50
2. 45
3. 33.33
4. 40

Q.

${\left(1.05\right)}^2-{\left(0.95\right)}^2=$

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Q. Adam is to select letterd from the alphabet list. The probability of Adam choosing a vowel from the alphabets is .

1. $\frac{5}{26}$
2. $\frac{1}{21}$
3. $\frac{21}{26}$

Q. The table below shows a random sample data to analyse the preference of music among the people at various clubs.
Calculate the percentage of people who doesn't prefer the genre rock.

1. 75%
2. 50%
3. 24%
4. 26%

Q. A survey is being conducted on a random sample as shown to analyse the music preference of the people.

Pop music is preferred by % of people.

1. 45
2. 33.33
3. 50
4. 40

Q. In a box, there are 20 marbles. Each marble is marked with a distinct number from 1 to 20. Find the probability of drawing a marble from the box which is marked with a number that is a perfect square.

1. $\frac{2}{5}$
2. $\frac{1}{4}$
3. $\frac{1}{6}$
4. $\frac{1}{5}$